Influence of Rotation on Pulsar Radiation Characteristics

We present a relativistic model for pulsar radio emission by including theeffect of rotation on coherent curvature radiation by bunches. We find thatrotation broadens the width of leading component compared to the width oftrailing component. We estimate the component widths in the average pulseprofiles of about 24 pulsars, and find that 19 of them have a broader leadingcomponent. We explain this difference in the component widths by using thenested cone emission geometry. We estimate the effect of pulsar spin on the Stokes parameters, and find thatthe inclination between the rotation and magnetic axes can introduce anasymmetry in the circular polarization of the conal components. We analyze thesingle pulse polarization data of PSR B0329+54 at 606 MHz, and find that in itsconal components, one sense of circular polarization dominates in the leadingcomponent while the other sense dominates in the trailing component. Oursimulation shows that changing the sign of the impact parameter changes thesense of circular polarization as well as the swing of polarization angle.Comment: 20 pages, 4 Postscript figures, uses aastex.cls. Accepted for Publication in ApJ 200